sysdeps/powerpc/power6/wcsrchr.c

   1 /* wcsrchr.c - Wide Character Reverse Search for POWER6+.
   2    Copyright (C) 2012-2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If
  17    not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #include <wchar.h>
  20
  21 #ifndef WCSRCHR
  22 # define WCSRCHR wcsrchr
  23 #endif
  24
  25 /* Find the last occurrence of WC in WCS.  */
  26 wchar_t *
  27 WCSRCHR (const wchar_t *wcs, const wchar_t wc)
  28 {
  29   const wchar_t *wcs2 = wcs + 1;
  30   const wchar_t *retval = NULL;
  31
  32   if (*wcs == wc)
  33     retval = wcs;
  34
  35   if (*wcs == L'\0') return (wchar_t *) retval;
  36
  37   do
  38     {
  39     wcs+=2;
  40
  41     if (*wcs2 == wc)
  42       retval = wcs2;
  43     if (*wcs2 == L'\0')
  44       return (wchar_t *) retval;
  45     wcs2+=2;
  46
  47     if (*wcs == wc)
  48       retval = wcs;
  49     if (*wcs == L'\0')
  50       return (wchar_t *) retval;
  51     wcs+=2;
  52
  53     if (*wcs2 == wc)
  54       retval = wcs2;
  55     if (*wcs2 == L'\0')
  56       return (wchar_t *) retval;
  57     wcs2+=2;
  58
  59     if (*wcs == wc)
  60       retval = wcs;
  61     if (*wcs == L'\0')
  62       return (wchar_t *) retval;
  63     wcs+=2;
  64
  65     if (*wcs2 == wc)
  66       retval = wcs2;
  67     if (*wcs2 == L'\0')
  68       return (wchar_t *) retval;
  69     wcs2+=2;
  70
  71     if (*wcs == wc)
  72       retval = wcs;
  73     if (*wcs == L'\0')
  74       return (wchar_t *) retval;
  75     wcs+=2;
  76
  77     if (*wcs2 == wc)
  78       retval = wcs2;
  79     if (*wcs2 == L'\0')
  80       return (wchar_t *) retval;
  81     wcs2+=2;
  82
  83     if (*wcs == wc)
  84       retval = wcs;
  85     }
  86   while (*wcs != L'\0');
  87
  88   return (wchar_t *) retval;
  89 }